<template>
  <div class="tags" v-if="showTags">
    <ul>
      <li class="tags-li" v-for="(item, index) in tagsList" :class="{ 'active': isActive(item.path) }" :key="index">
        <router-link :to="item.path" class="tags-li-title">{{ item.title }}</router-link>
        <span class="tags-li-icon" @click="closeTags(index)">
          <el-icon>
            <Close />
          </el-icon>
        </span>
      </li>
    </ul>
    <div class="tags-close-box">
      <el-dropdown @command="handleTags">
        <el-button size="small" type="primary">
          标签选项
          <el-icon>
            <ArrowDown />
          </el-icon>
        </el-button>
        <template #dropdown>
          <el-dropdown-menu size="small">
            <el-dropdown-item command="other">关闭其他</el-dropdown-item>
            <el-dropdown-item command="all">关闭所有</el-dropdown-item>
          </el-dropdown-menu>
        </template>
      </el-dropdown>
    </div>
  </div>
</template>

<script lang="ts">
import { computed } from "vue";
import { userStore } from "../stores/counter";
import { onBeforeRouteUpdate, useRoute, useRouter } from "vue-router";
export default {
  setup() {
    const route = useRoute();
    const router = useRouter();
    const isActive = (path: string) => {
      return path === route.fullPath;
    };

    const store = userStore();
    const tagsList = computed(() => store.tagsList);
    const showTags = computed(() => tagsList.value.length > 0);

    // 关闭单个标签
    const closeTags = (index: number) => {
      const delItem = tagsList.value[index];
      store.delTagsItem(index);
      const item = tagsList.value[index]
        ? tagsList.value[index]
        : tagsList.value[index - 1];
      if (item) {
        delItem.path === route.fullPath && router.push(item.path);
      } else {
        router.push("/home");
      }
    };

    // 设置标签
    const setTags = (route: any) => {
      const isExist = tagsList.value.some((item) => {
        return item.path === route.fullPath;
      });
      if (!isExist) {
        if (tagsList.value.length >= 8) {
          store.delTagsItem(0);
        }

        store.addTagsItem({
          name: route.name,
          title: route.meta.title,
          path: route.fullPath,
        });
      }
    };
    setTags(route);
    onBeforeRouteUpdate((to) => {
      setTags(to);
    });

    // 关闭全部标签
    const closeAll = () => {
      store.clearAllTags();
      router.push("/home");
    };
    // 关闭其他标签
    const closeOther = () => {
      const curItem = tagsList.value.filter((item) => {
        return item.path === route.fullPath;
      });
      store.closeTagsOther(curItem);
    };
    const handleTags = (command: string) => {
      command === "other" ? closeOther() : closeAll();
    };

    // 关闭当前页面的标签页
    // store.commit("closeCurrentTag", {
    //     $router: router,
    //     $route: route
    // });

    return {
      isActive,
      tagsList,
      showTags,
      closeTags,
      handleTags,
    };
  },
};
</script>


<style lang="less" scoped>
.tags {
  position: relative;
  height: 30px;
  overflow: hidden;
  background: #fff;
  padding-right: 120px;
  box-shadow: 0 5px 10px #ddd;

  ul {
    box-sizing: border-box;
    width: 100%;
    height: 100%;
    padding: 0;

    .tags-li {
      float: left;
      margin: 3px 5px 2px 3px;
      border-radius: 3px;
      font-size: 12px;
      overflow: hidden;
      cursor: pointer;
      height: 23px;
      line-height: 23px;
      border: 1px solid #e9eaec;
      background: #fff;
      padding: 0 5px 0 12px;
      vertical-align: middle;
      color: #666;
      -webkit-transition: all 0.3s ease-in;
      -moz-transition: all 0.3s ease-in;
      transition: all 0.3s ease-in;
      display: flex;
      justify-content: center;

      .tags-li-title {
        float: left;
        max-width: 80px;
        overflow: hidden;
        white-space: nowrap;
        text-overflow: ellipsis;
        margin-right: 5px;
        color: #666;
      }

      .tags-li-icon {
        display: flex;
        align-items: center;
      }
    }

    .tags-li:not(.active):hover {
      background: #f8f8f8;
    }

    .tags-li.active {
      color: #fff;
      border: 1px solid #409eff;
      background-color: #409eff;

      .tags-li-title {
        color: #fff;
      }
    }
  }

  .tags-close-box {
    position: absolute;
    right: 0;
    top: 0;
    box-sizing: border-box;
    padding-top: 1px;
    text-align: center;
    width: 110px;
    height: 30px;
    background: #fff;
    box-shadow: -3px 0 15px 3px rgba(0, 0, 0, 0.1);
    z-index: 10;

    .el-icon {
      margin-left: 5px;
    }

    button {
      width: 100px;
      height: 27px;
    }
  }
}
</style>
